EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)

The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.

• M : Marine benthic habitats (MA-MG)
  
  • MA1 : Littoral rock
    
    • MA11 : Arctic littoral rock
      
    • MA12 : Atlantic littoral rock
      
      • MA121 : Lichens or small green algae on Atlantic supralittoral and littoral fringe rock
        
      • MA122 : Mytilus edulis and/or barnacle communities on wave-exposed Atlantic littoral rock
        
      • MA123 : Seaweed communities on full salinity Atlantic littoral rock
        
      • MA124 : Mussel and/or barnacle communities with seaweeds on Atlantic littoral rock
        
        • MA1241 : Pelvetia canaliculata and barnacles on moderately exposed littoral fringe rock
          
        • MA1242 : Fucus spiralis on full salinity exposed to moderately exposed upper eulittoral rock
          
        • MA1243 : Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock
          
        • MA1244 : Fucus serratus on moderately exposed lower eulittoral rock
          
        • MA1245 : Rhodothamniella floridula on sand-scoured lower eulittoral rock
          
        • MA1246 : Mytilus edulis and Fucus vesiculosus on moderately exposed mid eulittoral rock
          
        • MA1247 : Mytilus edulis, Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock
          
        • MA1248 : Mytilus edulis and piddocks on eulittoral firm clay
          
      • MA125 : Fucoids on variable salinity Atlantic littoral rock
        
      • MA126 : Communities of Atlantic littoral rockpools
        
      • MA127 : Communities of Atlantic littoral caves and overhangs
        
    • MA13 : Baltic hydrolittoral rock
      
    • MA14 : Black sea littoral rock
      
    • MA15 : Mediterranean littoral rock
      
  • MA2 : Littoral biogenic habitat
    
  • MA3 : Littoral coarse sediment
    
  • MA4 : Littoral mixed sediment
    
  • MA5 : Littoral sand
    
  • MA6 : Littoral mud
    
  • MB1 : Infralittoral rock
    
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
    • MB61 : Arctic infralittoral mud
      
    • MB62 : Atlantic infralittoral mud
      
    • MB63 : Baltic infralittoral mud
      
    • MB64 : Black Sea infralittoral mud
      
    • MB65 : Mediterranean infralittoral mud
      
  • MC1 : Circalittoral rock
    
  • MC2 : Circalittoral biogenic habitat
    
    • MC21 : Arctic circalittoral biogenic habitat
      
    • MC22 : Atlantic circalittoral biogenic habitat
      
    • MC23 : Baltic circalittoral biogenic habitat
      
    • MC24 : Black Sea circalittoral biogenic habitat
      
    • MC25 : Mediterranean circalittoral biogenic habitat
      
  • MC3 : Circalittoral coarse sediment
    
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : Circalittoral mud
    
  • MD1 : Offshore circalittoral rock
    
  • MD2 : Offshore circalittoral biogenic habitat
    
  • MD3 : Offshore circalittoral coarse sediment
    
  • MD4 : Offshore circalittoral mixed sediment
    
    • MD41 : Arctic offshore circalittoral mixed sediment
      
    • MD42 : Atlantic offshore circalittoral mixed sediment
      
    • MD43 : Baltic offshore circalittoral mixed sediment
      
    • MD44 : Black Sea offshore circalittoral mixed sediment
      
    • MD45 : Mediterranean offshore circalittoral mixed sediment
      
  • MD5 : Offshore circalittoral sand
    
  • MD6 : Offshore circalittoral mud
    
  • ME1 : Upper bathyal rock
    
  • ME2 : Upper bathyal biogenic habitat
    
  • ME3 : Upper bathyal coarse sediment
    
  • ME4 : Upper bathyal mixed sediment
    
  • ME5 : Upper Bathyal sand
    
  • ME6 : Upper Bathyal mud
    
  • MF1 : Lower bathyal rock
    
  • MF2 : Lower bathyal biogenic habitat
    
    • MF21 : Arctic lower bathyal biogenic habitat
      
    • MF22 : Atlantic lower bathyal biogenic habitat
      
    • MF24 : Black Sea lower bathyal biogenic habitat
      
    • MF25 : Mediterranean lower bathyal biogenic habitat
      
  • MF3 : Lower bathyal coarse sediment
    
  • MF4 : Lower bathyal mixed sediment
    
    • MF41 : Arctic lower bathyal mixed sediment
      
    • MF42 : Atlantic lower bathyal mixed sediment
      
    • MF44 : Black Sea lower bathyal mixed sediment
      
    • MF45 : Mediterranean lower bathyal mixed sediment
      
  • MF5 : Lower bathyal sand
    
  • MF6 : Lower bathyal mud
    
  • MG1 : Abyssal rock
    
  • MG2 : Abyssal biogenic habitat
    
  • MG3 : Abyssal coarse sediment
    
  • MG4 : Abyssal mixed sediment
    
  • MG5 : Abyssal sand
    
  • MG6 : Abyssal mud
    
• MH : Pelagic water column
  
  • MH1 : Neuston
    
  • MH2 : Completely mixed water column with reduced salinity
    
  • MH3 : Completely mixed water column with full salinity
    
  • MH4 : Partially mixed water column with reduced salinity and medium or long residence time
    
  • MH5 : Unstratified water column with reduced salinity
    
  • MH6 : Vertically stratified water column with reduced salinity
    
  • MH7 : Fronts in reduced salinity water column
    
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
  • MHA : Fronts in full salinity water column
    
• MJ : Ice-associated marine habitats
  
  • MJ1 : Sea ice
    
  • MJ2 : Freshwater ice
    
  • MJ3 : Brine channels
    
  • MJ4 : Under-ice habitat
    
• N : Coastal habitats
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
  • S1 : Tundra
    
  • S2 : Arctic, alpine and subalpine scrub
    
  • S3 : Temperate and mediterranean-montane scrub
    
  • S4 : Temperate shrub heathland
    
  • S5 : Maquis, arborescent matorral and thermo-Mediterranean scrub
    
  • S6 : Garrigue
    
  • S7 : Spiny Mediterranean heaths (phrygana, hedgehog-heaths and related coastal cliff vegetation)
    
  • S8 : Thermo-Atlantic xerophytic scrub
    
  • S9 : Riverine and fen scrubs
    
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats